DE2164367A1 - Workpiece feeding device for sewing machines or the like - Google Patents

Description

PATENT LAWYERS F.W. HEMMERICH -GERD MÜLLER -D. G FU) SSt 22 129

.- bra -. December 21, 1971 -Bl-

Brother Kogyo. Nagoya-shi / Japan

Workpiece feeding device for
Sewing machines or the like

The subject of this invention is a workpiece feeding device for sewing machines or the like, which is characterized in that a feed element for feeding of the workpiece from its (takeover position with regard to its holding by resilient devices in motion is held and thereby enables a smooth and steady feeding of the workpiece to the sewing machine.

Whenever there are smaller parts or accessories, for example Labels, names, pockets and flaps are formed on a suit or on a piece of clothing, whenever they are smaller parts or accessories using a sewing machine working in the usual way, for example to the Body of a suit or a piece of clothing are sewn, then this process proceeds as follows: a workpiece is placed under the raised presser foot of the sewing machine in a prescribed or a specific position, whereupon the The presser foot is lowered again and the workpiece is held on the throat plate or the needle plate Sewing machine put into operation to carry out the necessary sewing process.

However, the process described above has some drawbacks. The machine operator must bring the workpiece under the raised presser foot in a certain or a prescribed position, which is associated with considerable difficulties. In some cases, the correct arrangement of the workpiece even requires several attempts. By deviating from the correct position , the value of the manufactured suit or garment is "

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In addition, the machine operator or the machine operator must a workpiece always under the dome raised sewing foot arrange when the aforementioned pre-sewing: ^ has been completed, so that finally disaffection and », r.n-idung arise, which, in turn, the work performance abfnll'v! -. Mt,

This invention therefore aims essentially for Sewing machines or the like a taork.Ttück-Znführur.gsvorrichtung, the guide to the machine operator or the machine operator; a will allow easy access to the machine and thereby the Zufcj guiding a workpiece is made easier because it is

The machine operator facilitates or is able to do the sewing to make this workpiece performance-based.

Another object of this invention is ** --- b, a workpiece feeding device to create a smooth: and steady feeding of the workpiece to the sewing machine.

The aim of this invention is furthermore to create a workpiece feed device which, by being placed on resilient components, can move in a sliding manner, whereby - even if, if, due to incorrect construction and assembly, differences in height between of the sewing machine needle plate w or the sewing machine needle plate, and

the feed plate, but also by attaching it to a table - the feed plate corresponding to such errors or discrepancies on the sewing machine needle plate or the sewing machine needle plate can slide forward and backward, on which then the workpiece with an already on this plate located tissue can be sewn. The feed plate slides easily over this fabric or fabric, even if this has a different thickness or has folds and puckers. The feed plate

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then also happens in an intermittent manner via the Connection between its holder and the machine bed or the machine needle plate / machine needle plate. she can but then, if these two components are relatively far apart, even with a soft and smooth reclining one Movement work.

Another object of this invention is to provide one Workpiece feeding device in which - this applies in particular to sewing machines that work in the usual way and in which the presser foot presses on the workpiece from above when it is sliding from the feed plate workpiece fed in after the feed plate has been withdrawn can be pressed firmly against the stitch plate or needle plate - the feed plate moves into the Starting position back -, only the workpiece under the sewing foot is held in order to finally be transported further for sewing when the sewing machine is started up.

Yet another object of this invention is to provide a workpiece feeding device having the aforesaid Has properties that are further constructed and designed so that with her the aforementioned objectives can be achieved. However, this can also be carried out with other versions of the example of the invention, as can be seen from a later description of the examples of the invention.

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This invention will now be explained in more detail below with reference to the exemplary embodiment shown in the drawing (the exemplary embodiments shown in the drawing). Din drawing shows in: -

1 shows a perspective view of a conventional sewing machine and one associated with this sewing machine Workpiece feeding device, both of which are mounted on a table.

Fig. 2 is an enlarged front view of the sewing machine and Workpiece feeding device.

Fig. 3 A longitudinal section through the workpiece feed device, the cover of which has been removed is

FIG. K A top view of the workpiece feed device shown in FIG. 3.

Fig. 5 A partial section of the resilient device for holding the feed plate.

6 is an enlarged front view of the operating mechanism for "the printing element.

Fig. 7 is a plan view of the aforementioned actuating device.

Fig. 8 The operation of the aforementioned actuator.

Fig. 9 A top view of the sewing foot of the sewing machine. Fig. 10 A side view of the presser foot of the sewing machine.

Fig. 11 of said sewing machine with the workpiece A perspective playback.

Fig. 12 is a plan view of the run under the presser foot workpiece, wherein after lowering this · Vlerlcstüok against the needle bed or needle plate of

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on the sewing machine.

Fig. 13 An electrical circuit which controls the operation of the workpiece feeding device and has to regulate.

Fig. 14 An electrical circuit showing the operational sequence the sewing machine, which is assigned to the workpiece feed device, to control and regulate Has.

As can be seen from FIGS. 1 and 2, the sewing machine table is identified by the general reference number 2, while a simple sewing machine or a cycle sewing machine is identified by the reference number 2. The frame or housing 3 of the sewing machine 1 includes a forearm h on which a sewing plate 5 is mounted as a holding surface for the workpiece. The reference number 6 indicates a needle holding rod which moves in a locking manner with the needle bar drive shaft of the sewing machine 1 (not shown here) up and down. A sewing machine needle 7 is inserted into the lower end of the needle holding rod 6. The presser foot operating mechanism arranged above the sewing machine forearm or the sewing machine boom k , on the front end of which the sewing machine foot 10 is placed, is normally pressed by a spring 9 downward. The Nähfußmeehanismus 8 is both the longitudinal direction and in the transverse direction by a cam disc 11 of the sewing machine rotates together with the needle bar driving shaft such back-and forth, that a workpiece, such as a fittikette, is moved together with the presser foot 10 , whereby a sewing operation is in turn performed. The presser foot 10 is connected to a presser foot lifting rod 12, which then moves upwards when the presser foot solenoid is on

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the underside of the table 1 is attached, voltage switched on receives and attracts, so that in turn the presser foot bar 12, which is connected to the sewing machine housing 3, together with the sewing foot 10 are raised. In the rear part of the sewing machine housing is a coupling and stopping device I ^ arranged with which the machine was brought to a standstill can be. After tightening the starting solenoids 15 are of the aforementioned coupling device 14 from all Parts of the sewing machine, including puch diy needle and the cam, driven! did the solenoid or the Electromagnet 15 once attracted orter it is a.Tinl Pn voltage has been placed, thin is the coupling device I ^ of a pawl 16 is held mechanically in the operating position. Even if the voltage from the solenoid or Lüektromagneten is removed and this falls off, is from the aforementioned clutch mechanism I ^ the machine also continues kept in operating condition. After completion of the sewing process, the pawl 16 is actuated by the cam disk 11 in such a way that that the stop mechanism is triggered and the machine brings to a standstill.

As can be seen from Fig. 2, the general Reference number 17 marked workpiece feeding device on the side of the sewing machine, but especially on the sewing foot 10, aligned in such a way that they can place a workpiece of some shape, for example a label, on the needle plate or bring the needle plate to the sewing machine. On table 1 is a with the general reference number 18 marked base screwed on, the on its underside with a control cabinet or control cabinet 19 for the to be described later in this patent application

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-Ge benden electrical control or electrical regulation is provided. An operating stand 2o is placed on the base 18 in such a way that it can be adjusted in height via a holding rod 21 which is screwed into the underside of the aforementioned base, namely via clamping screw 22 which clamps the holding rod 21. The actuating stand 20 is essentially a flat plate, the two longitudinal edges of which are directed upwards. A support plate or holding plate 23 is connected to the front end of the aforementioned actuating stand 20 by means of a screw 24 in such a way that its front end is essentially connected to the sewing plate 5 belonging to the sewing machine. (For the further advance of this patent application, the term "front linden" applies to the left side of the drawing, while the term "rear end" applies to the right side of the drawing). A drive housing 26 is rotatably mounted on the holding plate 23 in such a way that this drive housing 26 can rotate and pivot about a screw 25t which is guided through the upwardly folded side edges. As can be seen from FIGS. 3 and 5, the drive housing 26 is further constructed and designed in such a way that it can slide back and forth over the actuating stand 20, namely because it is resiliently supported by a spiral spring 29 is held, this spring extending between the underside of the drive housing 26 and an adjusting screw 28 which is connected to a cylindrical spring plate 27 and is led out over the aforementioned operating stand 20 downwards. The spring force of this spring 29, ie the vibration force or the vibration range for the drive housing 26 is set by means of the adjusting screw 28.

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provides or controlled and regulated. The prescribed position of the actuating housing or drive housing 26 is determined by an adjusting screw 30 which engages in the adjusting screw 28 already mentioned. The box-shaped drive housing 26 includes a locking bar 3I. The compressed air cylinder identified by the general reference number 32 is held in the horizontal position within the drive housing 26 by the two nuts 35 and 36 and is also supported in its longitudinal direction by the support elements 33 and Jk based. This air cylinder

k 32 is so constructed and dimensioned that its piston rod 37 by compressed air supplied by a (not shown here) Air compressor is supplied from, reciprocal! is moved. Associated with the compressed air cylinder are a first and at its upper front and rear ends, respectively a »wide speed control valve 38 and 39, with which the extension speed and the retraction speed of the piston rod is controlled and regulated. The aforementioned piston rod is driven by the compressed air, which is supplied to the compressed air cylinder from the compressor via two different Feed lines is fed. Of these piston speed control valves 39 and 38, the amount of compressed air is controlled and regulated, the adjusting screws (shown with FIG. 4) 40 and 41 of the cylinder 32 is supplied. With the front end of the part belonging to the piston rod 37, the is led out of the drive housing 26, a connecting piece 44 is connected by means of the nuts 42 and 43. To the The aforementioned connecting piece 44 is the feed plate 47 by means of the screws 46 using an additional one Connection plate 45 screwed on. With this feeder plate

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it is a thin rectangular plate, arranged on the holding plate or support plate 23, of a workpiece M, which has a certain shape, for example a shield cut out in a similar shape or a label cut out in a similar shape, and indeed in the form of the Sewing foot, as shown with Fig. K by two dash-dotted lines. On the above-mentioned feed plate 47, two Hflteelemente 49 are arranged, which have to bring the aforementioned shaped workpiece M into the correct position and to hold it there. These two retaining elements 49 are screwed to the connecting lath 45 using the screws 4 ^. ^{A stationary guide plate 1} SO is connected to the connection plate or the connection piece 44 in such a way that it protrudes from there.

The arrangement following the arrangement described above will now be described with reference to FIGS. 6 to 3. An actuating rod 51 'is connected to the guide plate 50 in such a way that it can slide on its surface in the longitudinal direction (ie to the right and to the left in the reproduced FIGS. 6 to 8). The guide plate 50 is connected to the connecting plate 44 by means of a stepped screw 53, the screw 53 being guided through a longitudinal hole 52 which is incorporated in the actuating rod 51 near the right side of the center. The operating rod 5I is normally deflected by a spring 55 which is tensioned between a pin or bolt 5 ^ · which protrudes substantially in the center of the aforementioned rod 51 and the stepped screw 5 "Ϊ, in such a way that the rear end thereof located in the drive housing 26. However, this deflection or deflection will

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limited by a pin or bolt 56, which is guided through the aforementioned longitudinal hole 52 and with the guide plate 50 connected is. The reference number 57 stands for a locking element that works as a stop and is essentially U-shaped is executed. One end of the locking device 57 forms a sing handle part 58, which is the rear egg of the actuating rod 51 receives and also by an operating lever 60, which is placed on the end of an actuating rod 5V extending outside the drive housing 26,

^ can be rotated or swiveled. The locking element

57 is normally pressed to the right according to FIG. 2 by a spring 6l wound around the actuating rod 59. If the feed plate k-7 is withdrawn, then despite the retraction of the feed plate k-7 (FIG. 8) against the action of the spring 55, the engagement part 58 of the locking device 57 remains in engagement with the rear end of the actuating rod 51. If, as can be seen from FIGS. 6 and 7, the actuating lever 60 is rotated to the left against the action of the spring 55, the engaging part 58 of the locking element 57 is released from the actuating rod 51 so that it is retracted by the action of the spring 55 can be. The front part of the operating rod 51 is downwards

P leads and furthermore provided with a recess 62 in the middle in such a way that a fork shape is created. In the recess 62, a stud 63 engages, from the one end of a stop plate 66 which by means of screws 65 connected to a pressure plate or the press plate 6K, a. This stop plate 66 or this pressure plate 6k is rotatably mounted in a pivot 67, namely at the front end of the guide plate 50 and such that the bolt 63 in response

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on the advancement and retraction of the guide rod or operating rod 51 in the vertical direction through the recess fc> 2 is printed. According to the representations in Fig. 2 to Fig.b ¹ , the pressure plate or pressure plate 64 is designed as a plate, the front half of which extends substantially downwards or is substantially guided downwards. This press lath or pressure oil atte hh is so around -the pivot 6? rotated or pivoted, d? it -ß the Zufiihrur.,? SDlatte 47 tiber the Anschlagolatte ti6 uni touched by th ^e above-mentioned feed plate 47 is lifted. ^; Retraction of the actuator rod Sl hampered by dss locking element 57, resulting in a relative displacement of the Zuführungsolatte 47 and the Betätigut ^ gs tpnge - when retracting the feed plate 47 is - this is evident from Fig Λ forth. .l leads. The bolt oil of the press lath or of the pressure plate 64 thus moves through the recess ö? down, so that the pressure plate or the pressure plate 64 around the pivot O? can rotate and thereby lifts off the feeder tip h-7 , ie it is in a substantially upright position with respect to the actuating rod 51. If, under these circumstances, the lever 60 is rotated against the action of the spring 61, the locking element 57 is released from the actuating rod 51, which, as can be seen from FIGS. 6 and 7, under the action of the spring 55 to the extent moves back so that its rear tir.de is guided over the locking element 57. This then in turn leads to the pressure plate or the pressure plate ok being rotated or pivoted by the action of the bolt 03 and actuating rod 51 in such a way that the feed plate 47 is touched by it.

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The general reference numbers 68 to 70 shown in FIG. 4 stand for three switches which are arranged at a distance from one another on the inner wall of one of the longitudinal sides of the drive housing 26. The switch pin 68P of the switch 68 is actuated by a switch arm 71 which is connected to the other end of the locking element 57 in such a way that when this locking element rotates to the left according to FIG. 2, the aforementioned switch arm 71 is pivoted upward and by pressing the switch pin 68p closes the switch 68. The second switch 69 is in the upper part of a metal brace 72 which extends across the middle part of the

Drive housing 26 extends, used, whereas the third switch 70 is arranged furthest back. According to Fig. 3 belong to these two switches, that is to say to the second switch 69 and to the third switch 70, the two switching pins 69P and 7OP, which at their end respectively, with a washer or Role are provided. The general reference number 73 in Fig. 3 stands for a guide rod or guide shaft, the such is arranged under the piston rod 37, dsß together moved with this piston rod. This guide rod or guide shaft 73 », which is rotatably mounted in the middle in a support block 72, is at its rear end with an attachment

74
Impact device, this integrally with the guide rod

^ forms which are also used to operate the switch finds. From the aforementioned stop device 74, the movement of the guide rod / guide shaft 73t is the derived from the forward movement of the piston rod 37, thereby limited to a certain distance that the stop device 74 strikes against the metallic support block 72. Thus, of the abovementioned stop device 74 also that of

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Piston rod 37 limits the distance to be covered, which in turn has the consequence that the nodding of the feed bar 47 is also limited to a certain amount. The second switch 69 and the third switch ? Ύ are actuated when their respective switch pins 69P and? UP come into contact with the polygonal half-part of the stop device 74. When it is pressed down by the connection device 74, the switching pin 69P of the second switch t> 9 ir ¹ ei ».ο escape groove that is machined into the metal block 72 is pressed. :> The retaining bolts marked with the reference number 75 in FIG. 3 are intended to protect the drive housing 26 against vibrations acting from the side. The reference number 76 indicates the outlet opening for a connecting cord, which is led through the base 18 to the control cabinet or control cabinet 19.

The pressure foot has essentially the same pentagonal shape as a workpiece. It is, as can be seen from Fig. 9 and Fig. 10, provided near its center with a narrow groove 77 , which allows that the pressure plate or press plate 64 (Fig.6) can pass through it so that they strike against the The press foot or the pressure foot is prevented. If a workpiece, which is held on the feed plate 47 by means of the pressure plate or pressure plate 64, as can be seen from FIG. 12, is placed on the sewing plate 5, the sewing foot 10 is then brought down in such a way that it presses on the workpiece, then there is no collision between the sewing foot 10 and the pressure plate or seizing plate 64. 9, the sewing foot 10 is also provided with a narrow slot 78. If, as can be seen from FIG. 12, the workpiece held by the sewing foot 10 is sewn, then this sewing process begins at the narrow slot 7B.

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around the sewing foot, i.e. sewing begins 11 at point N, follows the periphery S and finally ends at point 0.

In the following, with reference to Fi «. 13 and Fig.1 * 4-a Oil-based circuit for controlling and regulating the Operating blsufes of a feeding device for PE molded Workpieces are described, as well as the associated Stronkrois or the associated electrical circuit for the sewing machine.

The reference numbers 80 and 81 each stand for connections that refer to the electrical circuit for Mi ·? Sewing machine are guided. The connections or circuits mentioned below are arranged between the busbars or phases 8 and 83, which are led to the aforementioned connection terminals βθ and Hl It is closed by hand if the workpiece ignition device has to be switched off immediately. This emergency stop switch Hk is switched in such a way that when it is closed, an emergency stop relay 85 is connected to voltage and made to attract, k self-holding of this relay via a series circuit from the

Contact 68a of the first switch 65 and out of the normally Opened and designed as a normally open contact 85a of the aforementioned relay 85. The exciter coil 86 is around a coil for switching back a first electromagnetically switched valve which acts on the air supply in the retraction direction of the piston rod 37. This coil 86 is over the normally closed and designed as a break contact 87b of a first relay 87 applied to voltage and to Brought on tightening, wherein the aforementioned first tear 87 is such

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is switched such that it is brought the later-besctireibenden third relay 8M and through the normally open and running as normally open contact 89a of a first timer in the o9 iinschaltzustand through the normally closed and embodied as break contact H8B.. This first time switch 89 is the guarantee that for the lowering of the sewing foot 10, but puch for the subsequent retraction of the piston rod 37 into its starting position, but also for the retraction of the feed plate 47 from the needle bed or from the throat plate, the necessary time is given. The contact iWa de? The aforementioned first time switch 89 is then closed when this time switch 89 is connected to voltage and is energized. e opens again for the set time after the counting process has ended. The older contact marked with the reference number 85b and belonging to the emergency stop relay 8s already mentioned is a normally closed contact designed as an opener, which is arranged between one end of the return column 86 and that of the first relay 87, both of which are on the power rail or are led to phase 83. By pulling in the relay 85 as a result of pin actuation or closing of the emergency stop switch 84, the power supply to those other circuits that are not assigned to the return coil 86 is interrupted. Connected to the first relay 87 is a self-holding circuit designed as a series circuit, which is composed as follows: a normally open contact 68a of the first switch 68, which is designed as a normally open contact, a circuit 90 connected in the polarity shown, which has to block the reverse flow of current, as well as the normally closed and excluded as opener

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guided contact 91b. a second relay 91. An exciting coil 92 for driving an electromagnetic forward Switching valve that operates on the compressed air supply in the forward direction the piston rod 37 acts, is switched so that it is then applied to voltage - via the normally open or normally open contact 87a of the first relay 87 when this relay is in the on position is brought. The reference number 93 stands for the excitation coil of an electromagnetic (not shown here) Valve which supplies compressed air to a workpiece already mentioned, in such a way that this workpiece before the beginning the next sewing process is removed from the sewing plate. This coil 93 is connected in such a way that it then over the normally open and normally open contact 68a is applied and energized when the switch 68, i.e. the first switch, is closed. The clue number 9 ^ a looks for a normally open and as Normally open contact of a start switch (not shown here), which is arranged in this way in the control cabinet is that it can be operated via a pushbutton switch. With this start switch the sewing machine should be used alone and without the Use of the workpiece feeding device can be switched on. The normally open and normally open executed contact 9 ^ a is between the power rail or Phase 82 and a connection terminal 95 »the control circuit belongs to the sewing machine to be described later. The normally closed and normally closed one Contact 9 ^ + b of the aforementioned start switch is over that normally closed or designed as an opener contact 91b of the s second relay 91 between the busbar or Phase 82 and a terminal 96 arranged. This second relay 91 is connected between the busbars or phases 82 and 83,

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namely via the normally open and as a normally open contact executed contact 69s of the second switch 69, which is normally closed and designed as an opener contact 88b of the third relay 88 and via a specified in the Polarity arranged diode 97 for blocking the return flow of the current, in addition to which the later will also be added descriptive capacitor 98 is connected in parallel. The first Time switch is applied to both the normally open and normally open contact 91a of the second relay 91, when this is closed, as well as via the normally open and designed as a normally open contact Contact 69a of the second switch 69 when this is closed. A self-holding circuit also belongs to the second relay 91, which is built up after its normally open and normally open contact 91a has been closed via the normally closed and as Opener executed contact 88b of the third relay and via the diode 97. The reference number 99 stands for a second timer, the one required to operate the clutch mechanism or stop mechanism at the start of the sewing process Guaranteed timeframe. This second time switch 99 is executed via the normally open and normally open contact Contact 70a of switch 70 when it is closed is operated or applied to voltage, but also via the normally closed and designed as an opener Contact 8? B of the first relay 87. After the default time has elapsed, the second time switch 99 falls into its Starting position back. The contact 99a of the second timer switch 99 is arranged in the specified polarity Reverse current blocking diode 100 between the busbar or

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Phase 82 and the connection spun the -! Aod «97 and the second Relsis 91 separated, so (ia (3 of irm both the second Relay 91 connected to voltage for a certain period and to Tightening is brought as well as Snnnriur g to the terminal 95 is passed through a reverse current blocking diode »IC" 1. L; as to second timer 99 is switched on in parallel. third stage 88 is lived in tension at the same time -lr.d is made to attract, over its own normally open and a normally open contact ^ B? and normally closed and sLs opener executed contact 87b of the first relay 87, via which nucn the self-holding is being built.

The following is the elentriscr.o circuit of a sewing machine working in cycle oeschri ^ Der. wi-'l · · ", which is assigned to the electrical circuit for controlling and regulating the operational sequence of the feed device for shaped workpieces.

As is apparent from Fig. Ik has the belonging to this electric circuit transformer 102 has a primary winding with a center tap 106 of a W "chselstromquelle 103 via a main switch 105 and a fuse 104 are supplied with a voltage of for example 200 volts. The number of turns belonging to the secondary winding of this transformer is designed and selected in such a way that an alternating voltage of, for example, 7h volts can be drawn on the secondary side. The reference number 109 stands for a full-wave rectifier circuit which converts the voltage taken from the secondary winding of the transformer into a direct voltage. The DC voltage output terminals of this circuit are routed to lines 110 and 111, which in turn are connected to terminals 80

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and 8j of the electrical circuit for the workpiece feeder are performed. The connection terminal 95 is connected to the busbar or phase 111 via the Masnnin ^ n start relay 112. Between din ^! j1 ei chstroml ei dunking 110 and 111 is an auxiliary relay or St ^ jern "!? <ip 11 Ji switched, which is caused by closing a stop switch; = Hl, whereby the stop switch II3 after the stop of the sewing machine by actuation d ^ s to Startrelsic 112 belonging normally closed and ALP Offner r-usgeführten contact 112b and a = (Judges here shown) emergency stop lever is closed, in such a way he da'i later via its own contact il ^ a, normally open and designed as a normally open contact, after which it is held in self-holding mode. The connection Qb branches into two sections, namely via a coupling switch 115, which is closed in a locking manner with the actuation of the normally closed and normally closed contact 11 ^ b of the aforementioned auxiliary relay or control relay 114 and the coupling mechanism or stop mechanism; and is opened when the sewing machine has been put into operation via the aforementioned clutch mechanism. A branch end is led to the direct current line 111, via the sewing foot lifting relay 116, while the other branch end is also led to the direct current lead 111, via a circuit made up of a capacitor 120 and a high-voltage connection relay 121, a circuit made up of a resistor 119 and a series circuit made up of the reverse current blocking diode

117 to the closer 116a of the sewing foot lift relay 116 the

Kntladewiderstand II8 and the opener 116b of the relay Ho

is connected in parallel. Between terminal 95 and

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the high-voltage connection relay 121 is a diode in the specified polarity switched. But with it the high-voltage connection relay 121 and the sewing machine start relay 112 are only put into operation together if the Start switch 9 ^ of the electrical circuit for the workpiece feed device and the second timer 99 has been actuated or switched.

The reference number 123 stands for a full-wave rectifier circuit, which has to convert the alternating voltage (of 100 V) into a direct voltage after dividing the voltage. Between DC lines routed to the full-wave rectifier circuit 124 and 125, a start solenoid 128 is connected, which is implemented via the normally open and normally open contact Contact 112a of the sewing machine start relay 112 of this with a parallel arranged diode 126 to the course » close a counter electromotive force and thus to ensure reliable operation, as well as with a Spark extinction capacitor 127 - is closed. A sewing foot lift solenoid is also located between the aforementioned lines 132, which is provided with a similar diode 129 for short-circuiting the back electromotive force, is the same but also with a thyristor I3O to bring about a fast switching. The aforementioned presser foot solenoid I32 becomes Voltage is applied to the normally open contact 116a of the sewing foot stroke relay Ho, which is designed as a normally open contact and made to be attracted In the sewing machine of this invention, the workpiece feed cam is provided with a slit, so that the sewing of a workpiece starting at point N over the periphery (according to FIG. 11) to point u can be done. Before the sewing process can begin, you must

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a contact element connected to the pressure plate mechanism can be quickly established or repositioned so that the presser foot of the cam groove corresponding to the point 0 is moved out to the cam groove corresponding to the point N. This goal is achieved in that a Schnellverstellungsraechanismus Is used, the solenoid or electromagnet is shown in Fig. 14 under the reference number I33. This Solenoid or electromagnet 133 is parallel to starting solenoid I28. The quick-release limit switch marked with reference number 134 is locked when the quick release solenoid 133 is tightened closed, for example with the armature of the aforementioned solenoid or electromagnet I33. For this reason, after switching on the quick release device by the quick release solenoid 133 then the start solenoid the aforementioned quick adjustment limit switch 134 to voltage laid and made to wear. As for the high voltage circuit, one end becomes the branch portion of a circuit that of the other end of the high voltage winding or the primary winding 107 comes from, fed to a direct current line 124 via the normally open and normally open contact of the high-voltage connection relay 121, a diode 135 and a spark release capacitor I36 are connected in parallel. That the other end of the aforementioned branch circuit is routed to another direct current line 125, via the normally open and designed as a normally open contact 121a of the high-voltage connection relay 121, the / the one Similar reverse current blocking diode 137 and a spark release capacitor 138 are associated in parallel. The clue number 139

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stands for a thyristor that supports abnormally high voltage from the connection to the primary winding 107 of the transformer 102 has to prevent.

The following is a description of the workpiece guiding device for shaped workpieces, their arrangement and their mode of operation in conjunction with the assigned sewing machine. Because the actual workings of a kneading machine already exist can be assumed to be well known, the description thereof should be omitted. It should only apply to those parts of the machine ^ ne be referred to, the ^ an ^ an especially with the workpiece

Feed device for shaped work pieces are in connection.

1.) Mains connection

In the electrical shown with Fig. 13 and Fig. 1 * 4 Circuits, all switches are shown without current, i.e. the main switch 105 is open, all other switches are located themselves in their starting positions. If the main switch 105 is now closed, the sewing foot lifting relay Il6 put on tension and made to attract, namely via the normally closed and designed as an opener

Fe contact 91b_ of the second relay 91 as well as via the normally closed and normally open contact 94b of the start switch, both of which are shown in FIG. 13, but also via the normally closed and normally closed contact 114b of the auxiliary relay or control relay 114 and above the clutch switch 115, both of which are shown in FIG. With this, however, the normally open or normally open contacts Il6a and Il6a _? of the relay 116 is closed, whereas the normally closed contact Il6b designed as an opener

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this relay is opened. The high-voltage connection relay 121 is thus across the capacitor 120 only for a short time Time required for this capacitor to charge is put on tension. According to the Shiite who usually open contacts 121a designed as normally open contacts. and 121a becomes the presser foot lifting solenoid 132 by a heavy current for example 200 volts, d ^ r by rectification of the current switched on by the alternating current source be preserved, gylegt under tension and made to wear. With these measures there is a lifting of the sewing foot 10 by the action of the device, di >> has to raise and lower the aforementioned presser foot 10 in the vertical direction. is finally the capacitor 12C is fully charged then becomes the high-voltage connection relay 121 in its initial state or switched back to its starting position. from at this point in time the bie works through a high- Voltage current excited foot lift solenoid 132 with the small! Voltage current that is fed to it via the full-wave rectifier circuit 123, which in turn causes the sewing foot 10 is held in its upper position. If voltage is applied to the return excitation coil 8 under these conditions, and zwfr via the normally closed and as an opener executed contact 87b of the first relay 87 from Fig. 13 » then the piston rod 37 is inserted into the air cylinder 32 withdrawn.

2.) Function and mode of operation of the workpiece feed device for shaped workpieces and the associated one sewing machine

If the aforementioned conditions are met, then from Deposit element 4-9 a shaped workpiece M, for example

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- This is shown in Fig. 4 with two dash-dotted lines The Kttikette similar in shape to the presser foot 10, neatly the feed plate 47 of the workpiece feeder At this point the press slat or pressure plate is put down 64 via feeder points 4? raised, i.e. it is erect, essentially at right angles to the Actuating rod 51 arranged. This position is also maintained when the actuating rod * 51 with its rear Find in the stop S8 of the locking system 57 engages and moves forward against the action of spring 55. After the workpiece M has been placed on the feed plate 47 according to FIG turned to the left, the actuating pin 59 is also turned in the same direction against the force of the spring 61, in order to bring about a rotation of the locking element 57, then the rear bark of the operating rod 51 9US the stop 58 of the locking device 57 released and under the action of the spring ^ Slangs of the guide plate 50 withdrawn. After this withdrawal there is the plumbing or the pressure plate 64 with the actuating rod 5I connected by engaging between the front side of the aforementioned operating rod 5I and a bolt, Bolt 63, which rotates around a pivot 67 and then touches the feeder plsts 47, which in turn causes is that the molded workpiece M is pressed by the pressure plate 64 on the surface of the feed plate 4-7. to At this point, the locking element 57 rotates, the switching arm 71 is moved upwards and then presses against the Switch pin 68P of first switch 68 that is closed. This in turn becomes the first reproduced in Fir, I3

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Relay 87 is energized and made to attract, namely via the normally open and normally open contact 68a of the first switch 68, via the diode 90 and via the normally closed and opener contact 91b of the second relay 91.Self-holding of this relay later then via a circuit of its own normally open and normally open contact 87s and the normally closed and normally closed contact 91b of the aforementioned second relay 91. At the same time, the exciter coil 93 is switched via the normally open contact 68a of the first switch 68 voltage is switched on, which in turn blows compressed air bite currents over the sewing machine bed from a corresponding solenoid valve in order to thereby remove the workpiece sewn during the previous sewing process from the machine plate. A new workpiece is later placed on the machine plate and its surface. If, under these circumstances, the normally open and normally open contact 87a of the first relay 87 is closed and the solenoid 92 of the solenoid valve 32, which is then switched on, is energized and attracted, then the cylinder 32 is over straight this valve is acted upon with compressed air in such a way that the piston rod 37 is moved in the forward direction. But this also means that the feed plate k? moved into the waiting position on the platen, the workpiece M being brought to the underside of the raised sewing foot 10 by the pressure of the pressure plate 6 ^. Immediately after the start of movement of the piston rod 37 ₁ , namely in the forward direction, the switching arm 70P of the stop device 7k of the guide

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shaft 73i which is jointly with this stop device is pushed upward so that the switch 70, i.e., the third switch 70, is actuated so that its contact 70a closes. Because at this point in time the first relay 87 is still connected to voltage and its normally closed Kortakt or opener 87b remains open, can on the third Relay ÖC and no voltage on the second time switch 99 be switched.

Has the piston rod 3? moved forward so far that the stop device 7k of the guide shaft 71 is touched by the metal block 72, i.e. if the feed plate Wf has been brought into the working position just below the sewing foot IU, then the stop device 7k turns the switching pin 69P of the second switch 69 actuated "and its contact 69a closed, which in turn causes the second relay 91 to be attracted, namely via the aforementioned contact 69a, the normally closed and normally closed contact BBb of the third relay 88 and via the diode 97. self-holding via a circuit from its own normally open and normally open contact 91a, as well as via the aforementioned öffftenwKcHitakt 88b and the diode 97. After closing the normally open and normally open contact 91a of the second relay 91, the first time switch is via this contact 89 put on tension and begins - during the contact 89a is closed - with the counting of the default time.

After opening dee normally closed and as an opener executed contact 91b of the relay 87, that is: first Relay, which is led to this contact, from * Is because of the

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Actuation of the first time switch B- 'instead the contact ψ) ρ. closed, then the first relay 87 is connected to voltage via the already mentioned contact 99a and the normally closed contact 88b of the third roller, which is designed as an opener, and is made to pick up. But this only lasts for the preset the timer Hv timing and then riickg "än _f -i [: made, w-nn its contact 8YA opens W ^ nr the ZuiMhrungsnl * tt" * "7 on the machine bed is and.. has been brought under the foot, then the second "switch" or "j4 is actuated, the contact 69a of which is closed, whereupon the first relay and the wider relay 91 are again brought to pick up at the same time of the normally choppy contact or ufiYiers 67b, the first i-> lai ?, the voltage is removed from the exciter coil 82, but only for the set time of the timer 8V, which then temporarily interrupts the retraction of the Koloenstarge 37. During the standstill of the piston rod 37 is durcr. the open the normally closed contact or normally closed contact 9Ib _n of the second relay 91 of the Nähful3 10 moves downwards. the opening of this contact also prevents the Nähfui3 ~ ü Hubrelais 116 Voltage is applied via the opener 114b of the auxiliary relay or control relay 114 and the clutch switch 115 and picks up. While the closer 116a of the sewing foot lifting relay 116 remains open because this has returned to the initial state, the sewing foot lifting solenoid 132 is also caused to drop so that the sewing foot 10 is moved downward under the action of the spring of the sewing foot actuating device in such a way that it presses the workpiece M on the machine plate with the feed plate k-7 interposed therebetween. Almost equal-

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early rait the lowering of the sewing foot 10 and its pressing on the workpiece M, which is located on the feed plate 47, the first timer 89 ends its counting process for the preset time and opens its Contact 89a. However, this also means that the first relay 87 drops out and returns to the starting position, with the opening its normally closed contact or break contact 87b. causes the return excitation coil 86 to be energized and causes the piston rod 37 to retract into the cylinder 32. When the piston rod 37 is withdrawn, however, the feeder plsts 47 also return to their waiting position retracted on the support plate 23. At this point in time, "the workpiece M is still against the surface of the machine bed pressed by the presser foot 10, and this does not take into account the movement of the feed plate 47, which alone is released from the pressure by the sewing foot 10 and returned to the starting position.

During the return movement of the feeder plsts 47 (and briefly before its end) the rear end of the actuating rod is moved into the drive housing 26 in order to push against the stop 58 of the locking element 57 to be pressed by the action of the spring 6l has been returned to the starting position. The actuating rod is thus attached

^ prevents the movement of the feed plate 47 or the

■
To connect piston rod 37. There are a few intermediate stops

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between the actuating rod 51 and a component moving with it, for example the guide plate 50. Thus, the actuating rod 51 pushes the stopped guide plate 50 forward against the action of the spring 55. During this process, the pressure plate 64 is made to engage with its bolt 63 in the actuating rod 51 in such a way that it is set upright with respect to the actuating shaft 51, ie via the feed plate 4? raised xvird. In this way, however, the pressure plate 64 is brought into an inoperative position when it is returned by the actuating rod 51 and by the locking element 57. If the piston rod 37 is later withdrawn completely, the feed plate on the holding plate 23 is moved to its waiting position, then the third switch 70 is actuated by the stop device 74 of the guide shaft 73t, which moves with the piston rod 37, by acting on the switching arm? 0P its normally open contact 70a closed. After this contact? 0a is closed, the third relay 88 is first connected to voltage and made to attract and then holds itself via the self-holding circuit of its own normally open contact or make contact 88a and the normally closed contact or make contact 87b _{9 of} the first relay 87 · at this time, the lock of the second relay 91 is released, the drops then, by opening the normally closed contact or normally closed contact 88b _ of the third relay 88. On the other hand, is with the closing of the third relay 88, the second timer 99 voltage is applied across the same circuit and begins counting for the time specification «,

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After closing the contact belonging to the timer 99 99a, the second relay 91 is connected to voltage via the contact 99a and the diode 100 and is made to attract, but only for the default time of the timer 99. So but the sewing-foot Kubrelais 116 also remains open, so that a lifting of the sewing foot 10 is prevented.

The preparations for the next sewing process are, as has been described above, by pressing the second relay 91 - this only for the time setting

™ by the second timer - and by pressing the

Clutch mechanism carried out in the time in that the presser foot is held in the down position. After the contact belonging to the second timer 99 has been closed 99a is the 'start relay 112 of the sewing machine simultaneously with the actuation of the second relay via the contact 99a of the second time switch 99, the diode 101 and the connection Klegime 95 energized and attracted, the normally open contact or make 112a of the Start relay 112 is closed. But this becomes a high-voltage connection relay 121 through the same circuit and the diode 122 excited in such a way that its terminals 121a and

getting closed. After the quick setting switch IJk is closed due to the effect of the quick setting solenoid 133, the

Start relay connected to voltage, the number 128 is marked, namely - as with the sewing foot lifting solenoid I32 by high current, for example with a voltage of 200 V direct current and after conversion of the alternating current coming from the alternating current source not shown) coupling device that is actuated,

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verap.l Hsnen, da.- 'a ridge of g] »-d tendon blocks is continued to the working blocks and thereby sets the shaft in rotation so that the sewing machine can start sewing. If d ^'j r 99 later finished second timer its counting the standard time and his contact 9 * p opens dnrin di is? So.innon.g of the second relay removed, which then falls back into the starting position. If the second relay 91 remains closed at this point in the normally closed contact or opener, the sewing foot lifting relay 116 is not energized, so that the sewing foot 10 is lifted off during the sewing process is prevented. L) ': ρ third-i RelaisHB is of course held in the switching state during the sensation via the self-retention in the switching state.

As already heated, a workpiece of a certain shape is sewn onto the body of a suit or an item of clothing, namely by the fact that the needle lan; in such a way that the foot under the influence of the supply mechanism moves in the longitudinal direction and in the transverse direction at right angles to the direction of movement of the pelvis, which in turn leads to a sewing process. After completion of the sewing process, the belt is moved onto the idling pulleys, under the action of the coupling device, which cancels the action of the stop lever operated up to this point in time. With this, however, the clutch switch is brought back into the starting position, i.e. into its closed position, so that the sewing foot lifting relay 116 via the breaker 91b of the second relay _D via the breaker 9 ^ b of the

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Start switch, via the NC contact 114b of the auxiliary relay or Control relay 114 and via the clutch switch 115 is excited. This then leads to the high voltage connection relay 121 is temporarily put on tension to lift the presser foot 10 and made to tighten to the sewing machine to prepare for the next sewing process. Even under these conditions, the high voltage terminal relay 121 turns in its initial state so that the presser foot 10 is held in its upper position by the fact that the presser foot lifting solenoid 132 is supplied with low voltage power.

If a new shaped workpiece M is to be placed on the feed plate k7 for the next sewing process and read by the pressure plate, then the first switch of the switching arm 58 of the locking element 57 is actuated in such a way that its normally open contact 68a, which is designed as a normally open contact, is closed . However, this also, the coil is placed 93 ⁸ ^ voltage and ensures d8ß the finished workpiece is blown off from the machine bed by means of compressed air. The first relay is energized and causes the relay 88 to fall back into its original position, the advancing excitation coil 92 is also energized, which causes the feed plate k7 to be brought under the sewing foot, ™ by a forward movement of the piston rod 37 ·

By repeating the above-mentioned process, a label or another is formed successively and automatically Workpiece M brought onto the machine plate.

If such sewing is to be performed with an ordinary sewing machine and without using the workpiece feeding device of this invention, the presser foot is raised by turning the start switch off PIg. 13 ao is actuated that its opener 9h & is closed. so

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the start relay 112 and the high voltage connection relay 121 placed under tension in such a way that the sewing foot 10 moves downwards. This way the sewing machine is over led the aforementioned stations. Because the quick release solenoid 133 is energized before the start solenoid 128 is the quick adjustment mechanism of the machine is activated before the sewing process begins, so the sewing foot switches off immediately the position in which the needle has finished a sewing process is brought into the position in which the needle for a new one Sewing process is ready. If the emergency stop switch is activated while the feeder is working, the switch 84, then the emergency stop relay 85 is connected to voltage and made to attract, whereby its normally open contact 85? · is closed, self-holding via an electrical circuit from its own Contact 85a and the normally open contact or Normally open contact 68b of the first switch 68. After the emergency stop relay has picked up, all of the others except for the return coil 86 are switched off Circuits switched off. But so that the feed plate 4-7 is immediately by the retraction of the piston rod 37 in the Retracted starting position. The capacitor 98 with Fig. 13 reproduced electrical circuit is intended to prevent that the relay 91 is excited via a circuit from the opener 88b of the third relay 88 by switching this Relay due to the closing of the contact 70a belonging to the third switch. It should also be prevented that the relay 91 temporarily drops back to the starting position, namely because of the time interval between the opening of the normally closed contact 88b of the third relay and the closing of the timer contact 99a.

This invention is not intended to be limited to this described embodiment.

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example, but seek all modifications and detect changes that come within the scope of this invention fall. For example, the feed plate 47 cannot be driven only by the aforementioned compressed air cylinder, but also by other devices, for example Oil pressure, engine and manual operation.

The aforementioned exemplary embodiment relates to the FpII, in which a preformed small additional toilet is later applied to the body of a suit or an item of clothing. is sewn , however, it should be understood that if the body of a suit or a garment is previously placed on the sewing machine, to which a shaped workpiece is then placed, they can be sewn at the same time.

BATH ORIGINAL 209829/0680

Claims (9)

22 129 _ bh - 35 December 21, 1971 -Al- Brother Kogyo, Nagoya-shi / Japan patent claims; 1. workpiece feeding device for a sewing machine or the like,
characterized in that to it belong: a bracket that is near the machine is arranged; a feed element, which is placed on the aforementioned bracket and vertically and can be moved horizontally so that a workpiece can be neatly arranged; a resilient device between the aforementioned feed element and the holder, so that through them the feed element is held in a sliding state; and an actuator or a drive device, through which the feed element between a retracted position, in which the workpiece is taken over, and a front position in which the workpiece is transferred to the machine can be moved. BAD ORtGfNAL 9829 / ^ 6 22 129 _ bh 36. December 21, 1971 2. workpiece feed device according to claim 1, characterized by dnß the resilient device as a spiral spring with adjustable Spring force is executed. 3. Workpiece Znführungvorrichtung according to claim 1, characterized in that a pressure plate still belongs to her, which is movably arranged on the feed element and P to press the workpiece against the feed element Has; this pressure plate then over the feed element raised when in the retracted position and then brought back down to a To press the workpiece against the feed element during feeding, 4. Work feeding device for a sewing machine or similar, characterized in that it includes: a bracket located near the machine; a holder which is mounted on this bracket and which is adjustable in the vertical direction; a springy fore ^ direction that the holder and the bracket slide in one has to keep state; a feeding element on the holder such that it moves horizontally and can transfer the workpiece correctly; a drive device, which has to move the aforesaid feeding tube, namely between a retreat position, in which a workpiece is taken over, and a front position in which the workpiece is transferred to the machine will. BATH ORIGINAL 209829 / nsen 22 129 - bh 21.12.1971 -A3- 5. workpiece feeding device according to claim ^ _1, characterized in that the holder is designed as a box in which the drive devices are contained. 6. workpiece feeding device for a sewing machine or the like, characterized in that it includes: a bracket placed near the machine; a vertically movable holding device placed on the support; a first suspension device between the holder and the holder to keep this holder in a sliding state; a guide rod which is held by the aforementioned holding device so that it is with a their ends which protrude from the holding device can move horizontally; a feed plate connected to the protruding end of the guide rod is connected and has to pick up the workpiece; a drive device accommodated in the aforementioned holding device, which has to slide the guide rod and the feed plate, and between a rear position in which the workpiece is taken over, and a front position in which the workpiece is transferred to the machine; a pressure element which is pivotably connected to the guide rod is so that she / it can press the workpiece against the aforementioned feed plate; an operating rod for relative movement to this, one end of this is movably connected to the pressure element »a second Suspension device between the operating rod and 209829/0680 2184367 2 129 - bh 21.12.1971 38 - a 4 - and the guide rod for normally: .se bringing the aforementioned pressure plate into the pressing position; a control which is attached to the holding device and has to control the drive device, which in turn moves the guide stPng'j forward; a lever on the aforementioned η H »Lt < ^j device for acting on the control device ^ a third suspension device between ü-'ndstellhebel and rtelter, which normally prevents the drive elements from acting on the control device j a stop device on the Kpndstellhebel, dor the The movement of the actuating rod has to be stopped by the fact that it picks up the other end of the actuating device, regardless of the retraction movement of the guide rod against the negative effect of the second feeding device; This Anscnlagsvorricnturg is then released from the operating rod when the manual lever is rotated against the action of the third suspension device, which then in turn causes the operating rod to move by means of the second suspension device; bring down the pressure element so that it presses against the feed plate. 7. Workpiece feeding device for a cycle sewing machine, characterized in that belong to her; a machine housing with a machine bed and a needle plate formed on the surface; a reciprocating needle held by the housing, a sewing foot, which is placed on the workpiece holding plate across the Can move the direction of movement of the needle such that BADORIQtNAL 209829/0680 22 129 - bra - qq December 21, 1971 Wprkstück covers a predetermined distance, the sewing foot being designed and constructed so that it can be lowered onto the workpiece and lifted off the workpiece again. Further characteristics are: a holder ¹ arranged near the Tsktnahmaschins; a feeding element on this support that can move vertically and horizontally so that the workpiece is properly transferred; nine suspension device between the supply element and the holder, which holds the aforementioned Znfürhun ^ selemer.t in a smooth state; a drive device for the sliding movement of the feed element between a rear position in which the workpiece is taken over and a front position in which the workpiece is transferred to the machine, namely under the raised presser foot, which presser foot can be brought down and then presses on the workpiece holding surface when the feed member has been brought into the forward position; Moving the feed element back into the rear position, with the workpiece remaining under the lowered sewing foot. 8. workpiece feeding device according to claim 7, characterized in that a support plate belongs to the aforementioned bracket, which are arranged near the hYide of the machine bed in this way is that between you and the workpiece holder plane a smooth transition is made. BATH ORIGINAL 22 129 - bh 21.12.1971 - A 6 - 9. Workpiece feed device according to claim? characterized by drß to the aforementioned feed element a pressure plate movably connected to this belongs, dio das To press the workpiece against the feed element hstj a slot is machined into this pressure plate, which then when the feed movement goes forward Child fall through allows the pressure plate, whereby the workpiece by the aforementioned pressure plate or the pressure element is pressed against the feed element. - customer - BATH ORIGINAL 209829 / 068Q ⁴ H. Blank page.